Warning; Risk Of Severe Injury Or Death! Only Open The Actuator Under A Press; Actuator Under Spring Pressure; Caution - Gemü 620 Originalmontageanleitung

5.1 Disassembling the actuator

WARNING

Actuator under spring
pressure!
Risk of severe injury or
death!
Only open the actuator
under a press.
1. Separate actuator from control medium.
2. Remove loose compressor 3.
3. Remove protective cap SA2.
4. Remove optical position indicator SA1.
5. Remove protective caps 29.
6. Clamp actuator in a press.

CAUTION

Applied pressure too high!
Risk of breakage of actuator
top 10!
Only use minimum required
pressure.
7. Undo and remove bolts 12 with
washers 13 between actuator top 10
and actuator base 16.
8. Slowly release the press.
9. Remove actuator top 10.
10. Remove spring set comprising
compression springs IF, MF and AF,
from actuator base 16.
Important:
After disassembly, clean all parts
of contamination (do not damage
parts). Check parts for potential
damage, replace if necessary (only
use genuine parts from GEMÜ).
5.2 Replacement of spare parts
1. Disassemble actuator as described in
chapter 5.1, points 1-10.
2. Pull out actuator membrane assembly
manually upwards from actuator base
16.
The actuator membrane assembly
comprises actuator spindle 15 including
dowel pin 30 and adapter 31, hexagon
nut 21, washer 9, upper and lower
620
membrane plate 6, actuator membrane
14 and two sealing washers 22.
3. Fix actuator spindle 15.
Damage to the actuator spindle 15
when using unsuitable tools!
Damaged actuator spindle 15 can
no longer fulfi l its function.
Clamp actuator spindle 15 in a
vice with soft clamping jaws or
hold it with an appropriate tool
that will not damage the spindle
surfaces.
4. Remove hexagon nut 21 with open-end
wrench SW13.
5. Remove washer 9.
6. Remove upper membrane plate 6.
7. Remove upper sealing washer 22.
8. Diaphragm size 40 and 50:
Remove distance piece 28 and
O-ring 27.
9. Remove actuator membrane 14.
10. Remove lower sealing washer 22.
11. Diaphragm size 40 and 50:
Insert distance piece 28 and new
O-ring 27.
12. Insert new lower sealing washer 22.
13. Insert new actuator membrane 14.
The installation position is optional.
14. Insert new upper sealing washer 22.
15. Insert upper membrane plate 6 -
observe correct installation position
(see drawing chapter 5).
16. Insert washer 9.
17. Tighten new hexagon nut 21 with an
open-end wrench SW13 with 16 Nm.
18. Remove lock washer 5.
19. Remove lip ring 4.
20. Remove bush 17.
10 / 12
CAUTION